Double-toggle riveting machine



JulyBO, 1929. I R MANLEY 1,722,53@

DOUBLE TbGGLE RIVETING MACHINE Filed Sept-J 10, 1925 2 Sheets-Sheet 1 July 30,1929. R. E. MANLEY 1,722,530

DOUBLE TOGGLE RIVETING MACHINE 1 Filed Sept. 10, 1925 2 Sheets-Sheet 2 -50 I .24 4e: 46 1.5g 3 @5 I .60 Q50 3g a 6eriEMa nZ% Patented July 30, 1929.

UNITED STATES 1,722,530 PATENT OFFICE-1.

ROBERT E MANLEY, or YORK, PENNSYLVANIA, ASSIGNOR TO MANLEY MANUrAoI- TUBING COMPANY, or YORK, PENNSYLVANIA, A CORPORATION or DELAWARE.

DOUBLE-TOGGLE RIVETING MACHINE.

Application filed September 10, 1925. Serial No. 55,505

This invention relates to riveting machines, particularly to riveting machines of the type employed in the replacement of automobile brake bands.

The principal object of the present invention is to provide a powerful, quick acting riveting machine capable of taking care of the complete range of brake lining work so that it may be used for the smallest transmission 1 brake band and yet be perfectly satisfactory .when working upon the largest five ton truck external and internal shoes.

A further object of the present invention lies in the provision of a machine embodying a rocker arm and a toggle so designed as to relieve the plunger of the tremendous friction usually present in a device of this kind owing to the territfic side thrust of the toggle action.

A still further object of the presentinvention is the provision of a device employing a double toggle action whereby one jaw of the device may be moved toward the other jaw with a very little pressure at the beginning of the stroke, which pressure increases as the toggles simultaneously approach their straight line positions, with a consequent automatic increase almost to infinity of the power or leverage of the machine.

Other objects of the invention lie in the various specific details of the machine some of which while slight are of great importance, as for example, the provision of a manually adjustable lower jaw, so that different thick nesses'of material to be operated on may be taken care of, and yet the position of the' plunger at the end of its movement maybe selected so that at such position the toggle will be just off straight line position, and consequently at maximum power possible without looking. In actual practice the toggles never reach true straight line position as if they did it would require a blow to release the toggle.

In the drawings:

Figure 1 is a side elevation.

Figure 2 is a vertical'section.

Figure 3 is a perspective of a modified form of mounting.

Figurei is a modified form in which the toggles each reach dead-line position at the same instant.

Figure 5 is a modified form of my invention.

The form shown in Figures 1, 2 and 3 of furthermore permits the use of a wooden ta- Figure 3.

The main frame 14: has an upper arm 17 ,a lower arm 18, and a main Web 19, each prefble'between the frame and pedestal as in erably reinforced by the right angularly disposed ribs or flanges 20 in order to provide the requisite strength and rigidity, and to withstand the heavy duty imposedupon such machines. In spite of the greatpunishment borne by the machine I find it practical to make the frame of cast iron.

From each outeredge of the upper or top;

flange 21 rises a bracket 23, ribbed for strength as at 24, and also as at 25, these latter ribs merging with the diagonal ribs 27 from the corner of the front rib of flange of the main Web 19 and the lower flange '29 of the upper arm 17. A heavy pin or non-rotating shaft 30 passes between and connects the two brackets 23 and may be pinned or otherwise sec'uredto the boss 32 on either bracket. This shaft 30 is the pivot of the rocker arm 33 which operates the plunger 34 by means of direct contact on the work stroke and on the return stroke by a pair of small links 35 pivoted to the rocker arm and to theplunger by any desired means. The plunger 34c is, preferably cylindrical and slides rather freely in thebore in the upper arm 17, l

q At the extreme top of the two brackets is mounted an upper shaft 38, and this like the main shaft 30 is preferably non-rotatable, and may if desired be fastened positively in the two upper bosses 39, so as to strengthen quite materially the free tops of the two brackets. Pivoted upon the upper shaft 38 are. two swinging arms 40 connected together at their lower or free ends by a pin 41 which passes thru a pair of links 43 and also thru a connecting bar 44 located between the links and preferably of the same thickness as the rocker .sure' which may be exerted when the upper shaft 30, the pin 41, and the pivot 48 are in line, is infinity. I

Particular attention is called to the fact that the pivot 46 forming the joint between the two links 43 and the rocker arm 33 is approximately midway between the pivotal connection 49 between the rocker arm and the plunger links 35 and the main pivot 30 at the rear end of the rocker arm. By such construction the terrific side thrust incident to a usual toggle operated plungers is substantially eliminated and the toggle acts in a quite smooth fashion.

Attention is also invited to the fact that the connection at each end of the links 36 is loose so there is absolutely no shearing action on either the upper connecting pin 49 or the lower pin'50'as-the rocker arm itself directly engages and directly transmits pressure to the rather-large cylindrical plunger 34, the links 35 having their main use in the withdrawing of the plunger so that it will follow the end of the rocker arm to its upper limit of movement.

The connecting bar 44 which is pivoted as previously stated at the center of the pin 41 carried between the swinging arms 40 has at its rear end a similar pivoting pin connect- 4 ing the two ends 51 of the fork 52 of the main the lever 53 and the connecting bar 44 shall be quite far from maximum power position when the main toggle is at powerposition, the main toggle, as previously stated preferably being double, each single toggle being formed by swinging arm 40 and a link 43.

The foot treadle lever 55 is pivoted to the standard 10 as at 57 so as to operate along rod 58 pivoted to it and to a fork at the rear end of the lever 53, so that the treadle controls the downward oroperating movement of the plunger 34'. Movement in the reverse direction may be taken care of in any simple manner, as for example, by the spring 60 connected to the lever 53 fairly near the pivotv point 61 of. the rod 58 and also connected to the frame at a convenient place, as for example to a lug 56 at the rear of the supporting body.

In Figures 1 to 3 I have shown the lower end of the plunger 34 as provided with a set screw 66 by means of which anyone, as for example, 67, of a series of'tools may be inserted in the plunger, the tools being selected from the usual types and cooperating with a die secured in any desired manner in the cylindrical cavity of the screw 69 which has a knurled end 70.

It is quite important, although not essential, that the anvil or other lower tool be device can take care of any one of the differcut thicknesses of brake bands, for by properly'raising. the screw 69 with respect tothe upper arm 17, for example, the toggle may be made to come as near as desired to dead-line position,and therefore give maximum leverage, at exactly the point desired.

As illustrated in Figure 3 the riveting machine is shown mounted at one side of a wooden table 75 which also supports a drilling and counter-sinking machine 76 and a cutting clamp 7 7 thus providing an ideal brake relining unit. The rod78is preferably loosely supported, not fastened,at theback of the frames 7 9 and holds rolls of brake lining of the most popular sizes.

In Figure 5 I have shown the tools all mounted on a turret 80 pivoted to the slide 81 which replaces the plunger 34.

The operation of-the machineshOuId be obvious to one skilled in the. art. Therivets are first punched out and as. the device is illustrated in Figure 2 the punch is the tool that is in the plunger 34 and the cup 68 which receives and discharges the punched out rivet is shownas placed in the lower anvil. The punch and cup are now removed. and the proper dies, usually an anvil and a set, both of size tofit the particular rivet to. be: used, are secured in place as shown'in Figure 1,and the new'rivets set in the customary manner.

Due to the toggle action the rivet may be set not only with enormous power but with very quick action, the latter being due to the location of the lower joint 46' of the primary toggle, this doubling the speed of the plunger. The smallest brake band may be riveted either from the top or bottom, this: being: a very great advantage and not present in most riveting machines, and is not present-in any quick acting heavy duty riveting machine with which I am familiar.

What I claim is: I

1. In a riveting machine, a frame, an adjustable anvil thereon, a tool turret slidable in said frame, arocker arm, and toggl e-means for operating said rocker arm to depress said turret.

2. In a riveting machine, a:frlame,.a sliding member mounted therein, a rocker arm andia lever pivoted to the frame: about a single axis, a toggle pivoted to the frame and to the rocker arm, and a link pivoted to the lever I of the link is such that the link and rocker arm are substantially parallel when the toggle is straightened.

4:. In a device of the character described, a frame, an arm pivoted to the frame, a plunger slidable in the frame, means operatively connecting the plunger and arm, a lever pivoted concentrically with the arm and engaging the arm between its ends for reciprocating the plunger, and means connecting the lever and arm whereby they move about their common pivot at different speeds.

5. In combination, an arm and a lever having a common pivot, a plunger operated by the arm, and means including three links connected by a single pivot for transmitting motion from the lever to the arm.

6. In a riveting machine, a horizontal arm, a horizontal lever pivoted concentrically with the arm, a vertically reciprocating plunger operatively connected with the arm near its free end, a toggle connected to the arm between its pivot and its end, an elongated vertic'al link pivoted to the free end of the lever, pedal means for operating the elongated lever, and means connecting the lever to the toggle so as to move the arm at slower angular speed than the lever.

7. In a riveting machine, a frame, an anvil adjustably mounted in the frame, a plunger slidable in the frame in alinement with the anvil, a pivoted arm adapted to engage the plunger on the power stroke, a plurality of toggles pivoted to the frame and to the arm, a link pivotally connected to all of the toggle members and foot controlled means for moving the linkto straighten the toggles to cause the plunger to rivet an object held on the anvil, the anvil being adjustable so that the riveting is completed as the toggles straighten.

In testimony whereof I aflix my signature.

ROBERT'E. MANLEY. 

